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The function given is \( y = 5x - 2 \). Since this is a linear function (a polynomial of degree 1), the domain of a linear function is **all real numbers**. This is because there are no restrictions such as divisions by zero or square roots of negative numbers that would limit the values \( x \) can take.

So, the correct answer is **B. Domain: All real numbers**.

Would you like more details on how domains are determined? Here are five related questions:

1. What is the domain of a quadratic function, such as \( y = x^2 + 3x + 1 \)?
2. How do you find the domain of a rational function, like \( y = \frac{1}{x-2} \)?
3. What is the domain of a function involving square roots, such as \( y = \sqrt{x-4} \)?
4. Can a piecewise function have different domains for different parts?
5. How does the domain change for logarithmic functions like \( y = \log(x) \)?

**Tip**: Always check for divisions by zero or square roots of negative numbers when determining the domain of more complex functions!

Select the domain of the function y = 5x - 2.

Learn how to determine the domain of a linear function y = 5x - 2. This function is defined for all real numbers, making its domain unrestricted. Suitable for students in Grades 8-10.

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